In Blender version 2.64a, the Collada exporter changed the way it exports material names. All special characters in the material name are replaced with underscores. Before 2.64a special characters like '@' '[', etc. were preserved.

I am using a naming convention with special characters to get addtional material user data in the exported Collada file. But now this doesn't work since the special characters are removed.

Is this a bug I should report? If so, where do I do that? Is there another alternative for getting material user data exported to Collada?